Application Of Plastic Products Automatic Production Line Based On PLC

In recent years, As China's economic development, To the growing demand for PVC, Fast, efficient and safe PVC tube production lines into the direction of development.This article introduced the composition of mechanical structure of automatic production line of PLC tube, the characteristics and the working principle of PLC, Details the applitication of SIEMENS S7-300 PLC in the present system, and Describes the characteristics of the converter, the servo drive and some of electrical components.This article identified the core of the control system is SIEMENS S7-300 PLC, to make temperature and the electrical motor speed concentrated control; with the mutual machine of the touch panel monitoring temperature motor speed. The temperature and motor speed control adopts the fuzzy calculate PID.The system resolved the difficulties of the low temperature control accuracy and speed of synchronous instability, and has advantages control flexible and stability, programming convenient, operation easy and friendly. This kind of system has good performance and applicable value, it is a kind of better control strategy.